Fuel draining out of metal tube

[e350]

On my 2000 E-350 7.3L TD w/ 200K miles, there is a metal tube protruding beneath the engine on the right side (looking forward). Within a few seconds after I turn the key on (and hear the fuel pump run) fuel begins draining rapidly out this tube. I assume this continues after the engine is started and the vehicle is driven. It stops only after the key is turned off. Other than this the engine sounds and performs normally. My first thought was that it was the fuel water separator drain valve, so I shot some oil in the cable and worked it. No go. I think I will have to take the canister apart to see if the valve is shot. Any ideas anyone?

[e350]

Ok, solved. It was the drain valve. I know the reason everything is packed in so tight is because of the van chassis, but it sure seems like a filter and this valve could be more easily accessible.